Hello I have a 2012 Jeep Grand Cherokee Overland with the 5.7 engine. I installed the engine from the Jeep Grand Cherokee 6.4. But " Diablo intune DSX", can not correctly adjust the amount of fuel and ignition timing (angles jumps) , adjustment of switching-on the cooling fan not work also ! I need technical support. Do you have the opportunity to more accurately adjust my program because "CMR Custom Tuning Products" and "Diablo intune DSX" can not do it!

Privet man, I have no idea about programming the engine or fuel.
BUT I read once about a guy in a forum that modified an srt8 for off-road use, and he had problems with sensors (I donīt think you will have that if just swap the engine), and his transmission use to get very hot. So, be careful and research about transmission difference IF you are planning to go off-road.
AND if you got the engine from an SRT8, why didnīt you get the seats? (srt8 seats are awesome!)